Standard No.:	HJ 1446-2026
English Name:	Water quality— Determination of permanganate index — Sodium oxalate reduction alkaline titration
Chinese Name:	水质 高锰酸盐指数的测定 草酸钠还原碱性滴定法
Chinese Classification:	Z10    Environmental pollutant monitoring methods
Professional Classification:	HJ    Professional Standard - Environment
ICS Classification:	13.060.50 13.060.50    Examination of water for chemical substances 13.060.50
Source Content Issued by:	MEE
Issued on:	2026-01-20
Implemented on:	2026-5-1
Status:	to be valid
Superseding:	GB 11892-1989 Water quality-Determination of permanganate index
Target Language:	English
File Format:	PDF
Word Count:	7500 words
Translation Price(USD):	225.0
Delivery:	via email in 1~3 business day

本标准规定了测定水中高锰酸盐指数的草酸钠还原碱性滴定法。
本标准适用于地表水和地下水中氯离子浓度300 mg/L～3 000 mg/L的高锰酸盐指数（以O2计）的测定。
本方法的检出限为0.4 mg/L，测定下限为1.6 mg/L，测定上限为4.5 mg/L。